1885.] Zovlogy. 405 
two equal adductor muscles and with a pallial sinus; and 
the Taxodontæ, with numerous undifferentiated teeth and two 
equal muscles. To the first of these groups belong the Pho- 
ladomyidæ, Corbulidæ, Myidæ, Anatinidæ, Mactridæ, Paphi- 
æ, Glycimceride and Solenidæ?, and to the second the 
Desmodonta. From the Taxodonta branch off in one direction 
the Heterodonta, with distinct cardinal and lateral teeth fitting 
into each other and two muscle-impressions (Najadæ, Cardinidæ, 
Astartidæ, Crassatellidæ, Megalodontidæ, Chamidæ (Rudistes) 
(Tridacnidæ), Erycinidæ, Lucinidæ, Cardiidæ, Cyrenide, Cyprin- 
idæ, Veneridæ, Gnathodontidæ, Tellinidæ, Donacidæ), and in 
another, the Anisomyaria, with irregular or no hinge-teeth, two 
-unequal muscles or one only, and no pallial sinus. These form 
two suborders, Heteromyaria (Aviculidæ, Mytilidæ, Prasinidæ, 
Pinnidæ) and Monomyaria (Pectinidæ, Mytilidæ, Spondylidæ, 
Anomidæ, Ostreidæ). The Trigonidæ are considered a suborder 
of Heterodonta. 
ANTENNARY GLAND OF CyrHERIDÆ.—W. Müller-Blumenau has 
discovered that Æ/pidium brossliarum is able to secrete a sticky 
material while in water; the observations made in connection 
with this discovery led him to the belief that the animal was able 
to spin, and that the spinning organ was placed in the second pair 
of antennz. The organ so well known to be present at the base of 
this pair of appendages has been supposed to be poisonous in 
function, but no direct observations have ever been made in sup- 
port of this view, and it is opposed by the delicate nature of its 
flagellum, which could never be supposed to be capable of inflict- 
ing a wound. When the animal is found hanging to glass its an- 
terior end is always nearest to the glass, and the creature takes 
an oblique position. The author points out the difficulties pre- 
sented by the habits of the animal in determining the question 
which he has investigated, but it would seem to be certain that 
the antennary gland is possessed of the power of secreting an at- 
taching thread —¥ourn. Royal Microscopical Society, Dee. 
An Eye.ess Ert.—Some years ago a very aristocratic house 
at Elizabeth was deserted because of the beliet that it was 
haunted. Not. long ago it passed into new hands. An old well 
My wife and one of my sons saw it, an 
—S. Lockwood. 
TEMPERATURE AND HiserNaTion.—In the January NATURALIST 
(p 37), was an interesting article on the hibernation of the lower 
vertebrates. The author referred to hibernation as being in some 
